BMJ Case Reports has a paper that describes two patients with Parkinson’s disease who experienced hallucinations that transferred onto photos they took to try and prove they were real. This is ‘Patient 1′ from the case report:

Patient 1 was first evaluated at age 66, having been diagnosed with PD [Parkinson’s Disease] at age 58… She complained of daytime and night-time visual hallucinations for the past one year. Most of the time she did not have insight about them. She described seeing three children playing in her neighbor’s yard and a brunette woman sleeping under the covers in one of the beds in her house. She also saw images of different people sitting quietly in her living room. […] In one instance, she saw a man covered in blood, holding a child and called 911.

Her husband, in an attempt to prove to her that these were hallucinations, took pictures of the neighbor’s yard and the bed in their house. Surprisingly, when shown these photos, the patient continued to identify the same children playing in the yard and the same brunette woman sleeping under the covers. This perception was present every time the patient looked at these photos.